<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
div{width:10px; height:10px; background:red; position:absolute;}
</style>
<script>
	window.onload=function(){
		var aDiv=document.getElementsByTagName('div');
		document.onmousemove=function(e){
			var ev=e||event;
			var scrollt=document.documentElement.scrollTop||document.body.scrollTop;
			var scrolll=document.documentElement.scrollLeft||document.body.scrollLeft;
			for(var i=aDiv.length-1;i>0;i--){
				aDiv[i].style.left=aDiv[i-1].style.left;
				aDiv[i].style.top=aDiv[i-1].style.top;	
			};	
			aDiv[0].style.left=ev.clientX+scrolll+'px';
			aDiv[0].style.top=ev.clientY+scrollt+'px';
		};	
	};
</script>
</head>

<body>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
</body>
</html>
